Socket for incandescent electric lamps.



W. G. TREGONING. SOCKET PCR INCANDESCENT ELECTRIC LAMPS.

` APPLICATION FILED MAY 13, 1912. 1,090,354.

Patented Mar. 17, 1914.

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WILLIAM C. TREGONING, OF CLEVELAND, OHIO, ASSIGNOR TO THE TREGONINC ELECTRIC MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION.

SOCKET FOR- INGANDESCENT ELECTRIC LAMPS.

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Specification of Letters Patent.

Patented Mar. 1"?,1914.

Application filed May 13, 1912. Serial No. 696,867.

To all whom it may concern Beit known that I, l/VILLIAM C. TnnGoNrNG, citizen of the United States, residing at Cleveland, in the county of Cuyahoga and VState of Ohio, have invented certain new .elevation looking in from the left of Fig. 3

and showing the parts in position closing the circuitthrough the switch. Fig. 5 is a vertical sectional elevation on a line corresponding to 5 5, Fig. 2. Fig. 6 is a plan view of one of the lower fiber-body members,

Fig. 7 is a plan of the switch plate and the' key shaft and plunger. Fig. 8 is a plan of the switch plate in blank. Fig. 9 is a longitudinal sectional elevation of the said plate as bent and formed up for use, as seen in Fig. 2. Fig. 10 is an inside perspective view of the tumbler and Fig. 11 is a face view of the tumbler and cross section of the key shaft. Fig.- 12 is a plan of the lower contact plate or part which is adapted to be engaged by the lamp in the lamp socket.

In the application above mentioned two substantially equal body members or disks are used and the switch plate. has a certain defined construction from which the present plate differs as will presently be seen. Other differences also occur as the description will disclose. i

The body of the socket comprises the porcelain member 2, which is also the main support for the other parts, and the preferably fiber auxiliary member 3, the latter being relatively thin and of disk form with a recess cut therefrom as seen in Fig. 6 to make room for the tumbler. The switch plate 4 is a unitary member as in the foregoing case but with the difference that the switch tongue a is an extremity portion inthe blank as seen in Fig. 8 and adapted to be turned forward on its spring shank over the body of the plate, which comes substantially across the base of the bearing c of the blank and so as to throw the bearing or shaft hole to substantially right angles as compared with the body of the plate, Figs. 2 and "9. The opposite end portion ofthe plate also is bent at right angles so as to bring the shaft hole or bearing b therein into line with the hole c for shaft 6. One material advantage of this construction is to afford an increased length to the tongue a as compared with the former case and a bow or bend at the base of nthe tongue which contributes materially to its spring character. The disk 3 lies across the plate 4 and its recess f corresponds to a corresponding recess 9 in the porcelain member 2 and which is adapted to afford room for the operation of the tumbler 13, and the shaft 6 has the tumbler lixed thereon in said recess and has its bearings in the portions b and c and lies between the body of the plate and the tongue a, and the said bearings b and c are its only support. In the other case the .shaft lies in a groove in the lower disk between said bearings.

A conducting and contact piece 12 is shown in plan in Fig. 12 and adapted to be secured in the screw shell or socket 14 for the lamp and to be engaged by the tumbler on its fiat extremity and fastened in working position by screw bolt 15, a bulb being formed thereon as usual for engagement by the lamp. The circuit then will be through the said tumbler to said plate and thence through the lamp and socket 14 to the terminal 16 by screw 1S. The other terminal connection is with screw 17 and lip 19 of plate 4. The entire socket has the usual external or inclosing shell in one or more parts and insulation as between metallic surfaces is employed wherever needed, as for example, at 20 between the contact part 12 for the lamp, and the shell 14, Fig. 5.

The invention in general provides a relative short andcompact body for a lamp socket, the thin fiber disk 8 and theclamping of the plate by it within the upper disk', materially contributing to this endl. The shell 22 and cap 23 shown in Fig. 1, are of the usual standard size, and obviously the length thereof may be materially shortened.

The tumbler 13 is of simple construction and effective in operation, being made in one piece with its ends 23 bent at right angles and having a central opening for the key shaft 6 with two lips 25 projected from the body of the piece. The struck-up lugs 26 on shaft '6 play within theI limits defined by these lips but otherwise serve to rotate the tumbler.

'Ihe disk 2 .has a flattened surface 27 which is engaged by the bent portion b of the switch, thereby conning the said plate against end movement, the same effect being also obtained by a shoulder 28 at the opposite side within the recess 30, see Fig. 3.

What I claim is:

l. In electrical sockets, a porcelain member having a recess, a switch plate having a spring tongue bent back in overlapping relation therewith and seated within said recessand having a tumbler-opening opposite the free end of said tongue, a relatively thin fiber disk engaged with said plate at each side of said tongue, a Contact piece secured at the bottom of said disk, a key shaft having a rotatable bearing in said switch plate, and a tumbler fixed on said shaft between said tongue and contact piece opposite said tumbler-opening.

2. In electrical sockets, a non-conducting body, a switch-plate having alip at one end and a tongue with a bowed shank opposite said lip and bent back into overlapping relation with the body of said plate and provided with a shaft opening in saidshank, in combination with a key shaft rotatably supported in said plate, a tumbler on said shaft adapted to be rotated in said opening and an insulating disk in clamping relations with said plate.

8. In an electrical switch socket of the kind described, a key shaft havin lateral projections at its inner end, in com ination with a tumbler loosely mounted thereon consisting of a flat piece of metal having its opposite ends bent in the same direction to provide contact projections and having a central opening and two struck-up lips parallel to said ends and engaging the said shaft projections.

In testimony whereof I aiX my signature in presence of two witnesses.-

WILLIAM C. TREGONING.

Witnesses:

F. C. MUssUN, E. M. FISHER. 

